Explaining ultra-massive quiescent galaxies at $3 < z < 5$ in the context of their environments Christian K. Jespersen, Adam C. Carnall, Christopher C. Lovell arXiv:2507.05340v1 Announce Type: new Abstract: The swift assembly of the earliest galaxies poses a significant challenge to our understanding of galaxy formation. Ultra-massive quiescent galaxies at intermediate redshifts ($3 arXiv:2507.05340v1 Announce Type: new Abstract: The swift assembly of the earliest galaxies poses a significant challenge to our understanding of galaxy formation. Ultra-massive quiescent galaxies at intermediate redshifts ($3